A GERD flare-up calls for a layered approach: fast-acting relief to neutralize acid in your esophagus right now, followed by short-term dietary and positional changes that keep symptoms from bouncing back over the next few days. Most flare-ups improve within days once you combine the right over-the-counter medication with a few targeted habit shifts, though some people need several weeks before symptoms fully resolve.
Fast Relief in the First Hour
Your quickest option is a basic antacid like calcium carbonate (Tums or a store-brand equivalent). These work in roughly 10 minutes by directly neutralizing stomach acid already in your esophagus. They won’t last long, but they buy you immediate comfort.
If the burning keeps returning, add an H2 blocker such as famotidine (Pepcide). These take about an hour to kick in but reduce acid production for several hours afterward, giving your esophagus a longer window of relief. You can safely take an antacid and an H2 blocker together since they work through different mechanisms.
For flare-ups that stretch beyond a couple of days, a proton pump inhibitor (PPI) like omeprazole provides the strongest acid suppression available over the counter. PPIs don’t offer instant relief. They need one to three days to reach full effect, so they’re better thought of as a tool to break the cycle of a persistent flare rather than a rescue medication. If you find yourself reaching for PPIs regularly, that’s worth a conversation with a doctor, since long-term use carries some risks.
The Baking Soda Option
If you don’t have antacids on hand, baking soda (sodium bicarbonate) is a reasonable stopgap. The Mayo Clinic recommends half a teaspoon dissolved in a full glass of water, taken no more often than every two hours. Don’t exceed five teaspoons in a single day, and don’t rely on this approach for more than two weeks. Baking soda is high in sodium, so it’s a temporary fix, not a habit.
Foods to Avoid During a Flare-Up
During an active flare, your esophageal lining is already irritated, so foods that might only mildly bother you on a good day can make things significantly worse. The most reliable triggers across clinical studies fall into a few categories: spicy foods, fried and high-fat foods, and dense high-carbohydrate foods like bread, doughnuts, and thick noodles. Coffee and pizza also rank high on the list of symptom inducers.
Fat is the most well-documented dietary trigger. It slows stomach emptying and relaxes the muscular valve between your stomach and esophagus, giving acid more time and more opportunity to travel upward. Spicy foods work differently. They directly irritate the already-inflamed tissue in your lower esophagus, amplifying the burning sensation rather than causing new reflux episodes.
For the duration of a flare-up, lean proteins, non-citrus fruits, cooked vegetables, and smaller portions are your safest bets. You don’t need to follow a restrictive diet forever, but pulling back on known triggers for a week or two gives your esophagus time to heal.
Meal Timing Makes a Real Difference
When you eat matters almost as much as what you eat, especially at night. A randomized trial comparing early versus late dinners found that eating just two hours before bed produced significantly more acid reflux in the lying-down position compared to eating six hours before bed. The effect was even stronger in people who were overweight or had existing esophageal inflammation.
A practical target: finish your last meal at least three hours before you plan to lie down. During an active flare-up, aim for four or more hours if your schedule allows. Smaller, more frequent meals throughout the day also help by keeping your stomach from becoming overly full, which increases pressure on that lower esophageal valve.
How to Sleep During a Flare-Up
Nighttime is when GERD often feels worst, because gravity is no longer helping keep acid in your stomach. Two positional strategies have solid evidence behind them.
First, elevate the head of your bed. This means raising the actual bed frame or using a wedge pillow, not just stacking regular pillows (which tends to bend you at the waist and can make things worse). Elevating your upper body by six to eight inches lets gravity assist with acid clearance throughout the night.
Second, sleep on your left side. A systematic review and meta-analysis found that left-side sleeping significantly reduced both the amount of acid reaching the esophagus and the time that acid stayed in contact with esophageal tissue, compared to sleeping on the right side or on your back. The anatomy behind this is straightforward: your stomach curves in a way that keeps acid pooled away from the esophageal opening when you’re on your left. One randomized study found that people who adopted left-side sleeping had greater rates of reflux-free nights and measurable improvement in symptom severity scores within two weeks.
A Surprisingly Simple Trick: Chewing Gum
Sugar-free gum after meals can help with a flare-up. Chewing stimulates saliva production, and saliva is mildly alkaline, so it helps neutralize acid in your esophagus. More importantly, the increased swallowing frequency that comes with gum chewing improves the rate at which any refluxed acid gets cleared back down into your stomach. It’s not a substitute for medication during a bad flare, but it’s a useful add-on, especially after lunch or dinner.
How Long a Flare-Up Typically Lasts
With active treatment (medication plus lifestyle adjustments), many people notice relief within a few days. For others, particularly those with more significant esophageal inflammation, it can take several weeks for symptoms to fully settle. Without any intervention, GERD tends to be a chronic, recurring problem, so doing nothing and hoping a flare passes on its own is a losing strategy.
If your flare-up doesn’t respond to two weeks of consistent OTC treatment and lifestyle changes, that’s a signal to see a gastroenterologist. Some flare-ups are driven by structural factors like a hiatal hernia, where part of the stomach pushes above the diaphragm and creates a pocket that traps acid. These situations often need more targeted management.
Symptoms That Need Prompt Attention
Most GERD flare-ups are uncomfortable but manageable at home. A few symptoms, however, suggest something more serious is happening. Difficulty swallowing (food feeling stuck or painful going down), unexplained weight loss, vomiting blood or material that looks like coffee grounds, black tarry stools, and persistent vomiting all warrant prompt medical evaluation. The American College of Gastroenterology recommends endoscopy as soon as feasible when these alarm symptoms are present, because they can indicate complications like esophageal narrowing, ulceration, or precancerous tissue changes.